菌體成分に關する研究 (第3報) : 椎茸より分離したステリンの紫外線照射による變化に對する一考察

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1. Crystal insoluble in methanol was obtained by irradiating ergosterol (Content 62%) isolated from Cortinellus Shiitake with ultra-violet ray in etherial solution, and it consisted mostly of ergosterol.There was no difference in the ergosterol content of the products obtained by repeating the irradiation of the recovered crystal over again.2. As the results of the absorption spectrum analysis of the recovered crystal after irradiation 1〜4 times, E^^1__<1cm> (282 mμ) was 166.2,166.2,172.5 and 180.2 respectively, which correspond to 51.94,53.91 and 56.32% of ergosterol content.3. There was no constant relation between the quantity of the recovered crystal, i. e. the reaction rates at the irradiation by ultra-violet ray, and the units of produced Vitamin D_2.4. The units of produced Vitamin D_2 gradually decreased by irradiating the recovered crystal over again.5. It was recognised that the higher the secondary voltage and the longer the irradiation time, the more the units of Vitamin D_2 increased.
社団法人日本生物工学会の論文
1950-01-15